The Water Supply (Water Quality) (Scotland) Regulations 2000
< Previous | Contents | Next >
Regulations 2 and 4
SCHEDULE 1
PRESCRIBED CONCENTRATIONS AND VALUES
TABLE A
Microbiological parameters
Part I: Directive requirements
|
Item
|
Parameters
|
Concentration or Value (maximum)
|
Units of Measurement
|
Point of compliance
|
| |
|
1.
|
Enterococci
|
0
|
number/100ml
|
consumers’ taps
|
|
2.
|
Escherichia coli (E. coli)
|
0
|
number/100ml
|
consumers’ taps
|
Part II: National requirements
|
Item
|
Parameters
|
Concentration or Value (maximum)
|
Units of Measurement
|
Point of compliance
|
| |
|
1.
|
Coliform bacteria
|
0
|
number/100ml
|
service reservoirs* and water treatment works
|
|
2.
|
Escherichia coli (E. coli)
|
0
|
number/100ml
|
service reservoirs and water treatment works
|
Note: *compliance required as to 95% of samples from
each service reservoir (regulation 4(7))
TABLE B
Chemical parameters
Part I: Directive requirements
|
Item
|
Parameters
|
Concentration or Value (maximum)
|
Units of Measurement
|
Point of compliance
|
| |
|
|
|
|
|
1.
|
Acrylamide
|
0.10
|
µg/l
|
(i)
|
|
2.
|
Antimony
|
5.0
|
µgSb/l
|
consumers’ taps
|
|
3.
|
Arsenic
|
10
|
µgAs/l
|
consumers’ taps
|
|
4.
|
Benzene
|
1.0
|
µg/l
|
consumers’ taps
|
|
5.
|
Benzo(a)pyrene
|
0.010
|
µg/l
|
consumers’ taps
|
|
6.
|
Boron
|
1.0
|
mgB/l
|
consumers’ taps
|
|
7.
|
Bromate
|
10
|
µgBrO3/l
|
consumers’ taps
|
|
8.
|
Cadmium
|
5.0
|
µgCd/l
|
consumers’ taps
|
|
9.
|
Chromium
|
50
|
µgCr/l
|
consumers’ taps
|
|
10.
|
Copper(ii)
|
2.0
|
mg Cu/l
|
consumers’ taps
|
|
11.
|
Cyanide
|
50
|
µgCN/l
|
consumers’ taps
|
|
12.
|
1, 2 dichloroethane
|
3.0
|
µg/l
|
consumers’ taps
|
|
13.
|
Epichlorohydrin
|
0.10
|
µg/l
|
(i)
|
|
14.
|
Fluoride
|
1.5
|
mg F/l
|
consumers’ taps
|
|
15.
|
Lead
|
(a) 25,
from 25th December 2003 until immediately before 25th December 2013
|
µgPb/l
|
consumers’ taps
|
| |
|
(b) 10, on and after 25th December 2013
|
µgPb/l
|
consumers’ taps |
|
16.
|
Mercury
|
1.0
|
µgHg/l
|
consumers’ taps
|
|
17.
|
Nickel (ii)
|
20
|
µgNi/l
|
consumers’ taps
|
|
18.
|
Nitrate (iii)
|
50
|
mgNO3/l
|
consumers’ taps
|
|
19.
|
Nitrite (iii)
|
0.50
|
mgNO2/l
|
consumers’ taps
|
|
20.
|
Pesticides (iv)(v) -
|
|
|
consumers’ taps |
| |
aldrin}
dieldrin}
heptachlor}
heptachlor} epoxide}
|
0.030 |
µg/l
|
|
|
|
other pesticides
|
0.10
|
µg/l
|
consumers’ taps
|
|
21.
|
Pesticides: Total (vi)
|
0.50
|
µg/l
|
consumers’ taps
|
|
22.
|
Polycyclic aromatic hydrocarbons (vii)
|
0.10
|
µg/l
|
consumers’ taps
|
|
23.
|
Selenium
|
10
|
µgSe/l
|
consumers’ taps
|
|
24.
|
Tetrachloroethene and Trichloroethene
(viii)
|
10
|
µg/l
|
consumers’ taps
|
|
25.
|
Trihalomethanes: Total (ix)
|
100
|
µg/l
|
consumers’ taps
|
|
26.
|
Vinyl chloride
|
0.50
|
µg/l
|
(i)
|
Notes:
(i) The parametric value refers to the residual monomer
concentration in the water as calculated according to specifications of the
maximum release from the corresponding polymer in contact with the water. This
is controlled by product specification.
(ii) "The value applies to a sample of water
intended for human consumption obtained by an adequate sampling method ["to
be added following the outcome of the study currently being carried out"]
at the tap and taken so as to be representative of a weekly average volume ingested
by consumers. Where appropriate the sampling and monitoring methods must be
applied in a harmonised fashion to be drawn up in accordance with Article 7(4).
Member States must take account of the occurrence of peak levels that may cause
adverse effects on human health."
(iii) See also regulation 4(5).
(iv) See the definition of "pesticides and related
products" in regulation 2.
(v) The parametric value applies to each individual
pesticide.
(vi) "Pesticides: Total" means the sum
of the concentrations of the individual pesticides detected and quantified in
the monitoring procedure.
(vii) The specified compounds are:
- benzo(b)fluoranthene
- benzo(k)fluoranthene
- benzo(ghi)perylene
- indeno(1,2,3-cd)pyrene.
The parametric value applies to the sum of the concentrations
of the individual compounds detected and quantified in the monitoring process.
(viii) The parametric value applies to the sum
of the concentrations of the individual compounds detected and quantified in
the monitoring process.
(ix) The specified compounds are:
- chloroform
- bromoform
- dibromochloromethane
- bromodichloromethane.
The parametric value applies to the sum of the concentrations
of the individual compounds detected and quantified in the monitoring process.
Part II: National requirements
|
Item
|
Parameters
|
Concentration or Value (maximum unless otherwise stated)
|
Units of Measurement
|
Point of compliance
|
| |
|
1.
|
Aluminium
|
200
|
µg Al/l
|
consumers’ taps
|
|
2.
|
Colour
|
20
|
Mg/l Pt/Co
|
consumers’ taps
|
|
3.
|
Hydrogen ion
|
10.0
6.5 (minimum)
|
PH value
PH value
|
consumers’ taps
|
|
4.
|
Iron
|
200
|
µg/l
|
consumers’ taps
|
|
5.
|
Manganese
|
50
|
µg/l
|
consumers’ taps
|
|
6.
|
Odour
|
3 at 25° C
|
Dilution number
|
consumers’ taps
|
|
7.
|
Sodium
|
200.
|
mgNa/l
|
consumers’ taps
|
|
8.
|
Taste
|
3 at 25° C
|
Dilution number
|
consumers’ taps
|
|
9.
|
Tetrachloro-methane
|
3
|
µg/l
|
consumers’ taps
|
|
10.
|
Turbidity
|
4
|
NTU
|
consumers’ taps
|
< Previous | Contents | Next > |
Your Views 
